EP2AGX95EF29C6N Datasheet, PDF (40/380 Pages) Altera Corporation – Device Interfaces and Integration

2–10
Chapter 2: Logic Array Blocks and Adaptive Logic Modules in Arria II Devices
Adaptive Logic Modules
Extended LUT Mode
Use extended LUT mode to implement a specific set of 7-input functions. The set must
be a 2-to-1 multiplexer fed by two arbitrary 5-input functions sharing four inputs.
Figure 2–9 shows the template of supported 7-input functions using extended LUT
mode. In this mode, if the 7-input function is unregistered, the unused eighth input is
available for register packing.
Functions that fit into the template, as shown in Figure 2–9, often appear in designs as
“if-else” statements in Verilog HDL or VHDL code.
Figure 2–9. Template for Supported 7-Input Functions in Extended LUT Mode
datae0
datac
dataa
datab
datad
dataf0
datae1
5-Input
LUT
5-Input
LUT
combout0
DQ
reg0
dataf1
(1)
To general or
local routing
To general or
local routing
This input is available
for register packing.
Note to Figure 2–9:
(1) If the 7-input function is unregistered, the unused eighth input is available for register packing. The second register, reg1, is not available.
Arria II Device Handbook Volume 1: Device Interfaces and Integration
December 2010 Altera Corporation